package domain;

import java.util.Scanner;

public class Dome1 {
    public static void main(String[] args){
        final float Π=3.14f;
        Scanner scanner = new Scanner(System.in);
        int r = scanner.nextInt();
        System.out.println("圆形的周长为："+2*Π*r);
        System.out.println("圆形的面积为："+Π*Π*r);
    }
}
